Control circuit for the auxiliary engine to stop after the main engine has stopped

 The circuit is shown in Figure 3-84. As can be seen from the figure, the two motors can be started separately. But only when
the stop button SBz of the main machine (Ml) is pressed (after the contactor KMi is released), and then the stop button SB4 of the auxiliary machine (Mz) is pressed, M2 can be
stopped. SBs is the emergency stop button. When two motors need to be stopped at the same time, just press SBs.